Solar Ink 300

Solar Ink 300 is a series of active layer inks optimised for printing of organic photovoltaic devices (OPVs) using inverted architecture geometry deposited by slot-die coating.




The Solar Ink 300 Series has been fully optimised to work in all of the FOM Technologies printers including the Mini Roller Coater (TM), the FOM R&D Sheet Coater, Solar X3 R&D Coater and the Nano Roll Coater.

They can be successfully printed onto zinc oxide surfaces and in turn be coated with hole trapping layers (HTL) such as PEDOT:PSS.


Solar Ink 300 P is an ink based on a mixture of regioregular poly(3-hexylthiophene) (rr P3HT) and [6,6]-phenyl-C61butyric acid methyl ester (PCBM). Solar Ink 300 I is an ink based on regioregular poly(3-hexylthiophene) and indene C60 bisadduct (ICBA). Both of these products are manufactured with chlorobenzene as the solvent.

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A number of critical properties of the active ink formulation affect the OPV device performance when manufactured using coating and printing techniques.

  1. The optimisation of the wetting properties of the ink to ensure even coverage over the zinc oxide surface.

  2. For optimum device performance, the active layer must contain appropriately phase separated domains of polymer and fullerenes to allow charge separation and percolation pathways for charge carrier transport. The domain sizes are controlled in part through the careful selection of additives and the solvent within the Solar Ink 300 formulations.

  3. Finally, due to the charge carrying nature of rr P3HT, there is potential, if using high speed, long run reel to reel manufacturing, to build up electrostatic charges in the process. This can be greatly minimised through careful control over the Solar Ink 300 properties.


Product Voc (mV) Jsc (mA/cm2) FF PCE (%)
Solar Ink 300 P 611


0.6 3.2
Solar Ink 300 I 843 9.5 0.64 5.4

Features and Benefits of Solar Ink 300 I and 300 P

Feature Benefit
Fully formulated ink product. Provides a consistent and accurate source of active layer materials, leading to consistent device performance. No need for weighing individual components of the ink, potentially leading to device efficiency variation.

Compatible with other components in the OPV device. This ensures optimum device efficiency as the performance of the Solar Ink 300 Series has been fully tested within a complete OPV device package.

Available in two performance grades. The economical Solar Ink 300 P can be used in equipment commissioning or for building OPV devices where device efficiency is not critical. Solar Ink 300 I can be used were optimal device efficiency is required.

Suitable for use in a wide range of printing platforms. The Solar Ink 300 Series products have been tested on the full range of FOM Technologies printers, including the Mini Roller Coater (TM), Bench Top Coater, R2R Solar X3 coater and the Nano Coater.


Before opening the Solar Ink bottles, read the material safety data sheet. After opening the Solar Ink 300 series bottles they should be kept under nitrogen and stored in the dark after use. Use the Solar Ink 300 series in well ventilated areas as they contain chlorinated solvents. The concentration levels of the active materials have been carefully designed to provide maximum OPV device efficiency and therefore care should be exercised not to allow evaporation of the chlorobenzene solvent as this will cause changes in the concentration of the active layer components and ultimately non optimal OPV device results. As well the Solar Ink 300 Series products should not be diluted with other solvents as this will also change the concentration levels of the active layer components and again lead to non optimal OPV results.

The shelf life of the Solar Ink 300 Series if stored under nitrogen and in the dark at room temperature will be two years.

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